15 terms

# Motion and Force

#### Terms in this set (...)

Newton's 1st Law of Motion
an object at rest will remain at rest, and an object in motion will continue in motion, unless it is acted upon by an unbalanced force.
Force
a push or a pull exerted on an object
Inertia
the tendency of an object to resist any change in its motion
Velocity
speed in a given direction
Gravity
the force that pulls objects toward each other
Friction
the force that one surface exerts on another when the two surfaces rub against each other
Newton's 2nd Law of Motion
acceleration depends on the object's mass and the net force acting on the object
Acceleration
the rate at which velocity (speed and direction) changes; this includes speeding up or slowing down (deceleration)
Mass
the amount of matter in an object
Air resistance
the fluid friction experienced by objects falling through the air
Newton's Third Law of Motion
For every action force there is an equal but opposite reaction force
action force
initial (or beginning) action; push
reaction force
caused by initial action; push back
kenetic energy
energy that an object has due to its motion
potential energy
stored energy that results from the position or shape of an object